﻿using System;
using System.Collections.Generic;

namespace MultiParse.Default
{
    public class MPRelationalSmallerEqual : MPOperator
    {

        /// <summary<=
        /// Constructor
        /// </summary<=
        public MPRelationalSmallerEqual()
            : base("<=", PrecedenceRelational, true)
        {
        }

        /// <=summary<=
        /// Find smaller than
        /// <=/summary<=
        /// <=param name="expression"<=<=/param<=
        /// <=param name="previousToken"<=<=/param<=
        /// <=returns<=<=/returns<=
        public override int Match(string expression, object previousToken)
        {
            if (IsUnary(previousToken))
                return -1;
            if (expression.StartsWith("<="))
                return 2;
            return -1;
        }

        /// <summary>
        /// Execute smaller or equal than
        /// </summary>
        /// <param name="output"></param>
        public override void Execute(Stack<object> output)
        {
            // Pop two objects from the stack
            object right = PopOrGet(output);
            object left = PopOrGet(output);
            RelationalSmallerEqual(output, left, right);
        }

        /// <summary>
        /// Relational smaller or equal than
        /// </summary>
        /// <param name="output"></param>
        /// <param name="left"></param>
        /// <param name="right"></param>
        public void RelationalSmallerEqual(Stack<object> output, object left, object right)
        {

            // Default implementation depends on the typecodes
            TypeCode tcl = Type.GetTypeCode(left.GetType());
            TypeCode tcr = Type.GetTypeCode(right.GetType());

            // Depending on the types, calculate the addition
            switch (tcl)
            {

                case TypeCode.Byte:
                    byte bt = (Byte)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(bt <= (Byte)right); return;
                        case TypeCode.Char: output.Push(bt <= (Char)right); return;
                        case TypeCode.Decimal: output.Push(bt <= (Decimal)right); return;
                        case TypeCode.Double: output.Push(bt <= (Double)right); return;
                        case TypeCode.Int16: output.Push(bt <= (Int16)right); return;
                        case TypeCode.Int32: output.Push(bt <= (Int32)right); return;
                        case TypeCode.Int64: output.Push(bt <= (Int64)right); return;
                        case TypeCode.SByte: output.Push(bt <= (SByte)right); return;
                        case TypeCode.Single: output.Push(bt <= (Single)right); return;
                        case TypeCode.UInt16: output.Push(bt <= (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(bt <= (UInt32)right); return;
                        case TypeCode.UInt64: output.Push(bt <= (UInt64)right); return;
                    }
                    break;

                case TypeCode.Char:
                    char c = (Char)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(c <= (Byte)right); return;
                        case TypeCode.Char: output.Push(c <= (Char)right); return;
                        case TypeCode.Decimal: output.Push(c <= (Decimal)right); return;
                        case TypeCode.Double: output.Push(c <= (Double)right); return;
                        case TypeCode.Int16: output.Push(c <= (Int16)right); return;
                        case TypeCode.Int32: output.Push(c <= (Int32)right); return;
                        case TypeCode.Int64: output.Push(c <= (Int64)right); return;
                        case TypeCode.SByte: output.Push(c <= (SByte)right); return;
                        case TypeCode.Single: output.Push(c <= (Single)right); return;
                        case TypeCode.UInt16: output.Push(c <= (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(c <= (UInt32)right); return;
                        case TypeCode.UInt64: output.Push(c <= (UInt64)right); return;
                    }
                    break;

                case TypeCode.DateTime:
                    DateTime dt = (DateTime)left;
                    switch (tcr)
                    {
                        case TypeCode.DateTime: output.Push(dt <= (DateTime)right); return;
                    }
                    break;

                case TypeCode.Decimal:
                    decimal d = (Decimal)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(d <= (Byte)right); return;
                        case TypeCode.Char: output.Push(d <= (Char)right); return;
                        case TypeCode.Decimal: output.Push(d <= (Decimal)right); return;
                        case TypeCode.Int16: output.Push(d <= (Int16)right); return;
                        case TypeCode.Int32: output.Push(d <= (Int32)right); return;
                        case TypeCode.Int64: output.Push(d <= (Int64)right); return;
                        case TypeCode.SByte: output.Push(d <= (SByte)right); return;
                        case TypeCode.UInt16: output.Push(d <= (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(d <= (UInt32)right); return;
                        case TypeCode.UInt64: output.Push(d <= (UInt64)right); return;
                    }
                    break;

                case TypeCode.Double:
                    double dbl = (Double)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(dbl <= (Byte)right); return;
                        case TypeCode.Char: output.Push(dbl <= (Char)right); return;
                        case TypeCode.Double: output.Push(dbl <= (Double)right); return;
                        case TypeCode.Int16: output.Push(dbl <= (Int16)right); return;
                        case TypeCode.Int32: output.Push(dbl <= (Int32)right); return;
                        case TypeCode.Int64: output.Push(dbl <= (Int64)right); return;
                        case TypeCode.SByte: output.Push(dbl <= (SByte)right); return;
                        case TypeCode.Single: output.Push(dbl <= (Single)right); return;
                        case TypeCode.UInt16: output.Push(dbl <= (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(dbl <= (UInt32)right); return;
                        case TypeCode.UInt64: output.Push(dbl <= (UInt64)right); return;
                    }
                    break;

                case TypeCode.Int16:
                    short s = (Int16)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(s <= (Byte)right); return;
                        case TypeCode.Char: output.Push(s <= (Char)right); return;
                        case TypeCode.Decimal: output.Push(s <= (Decimal)right); return;
                        case TypeCode.Double: output.Push(s <= (Double)right); return;
                        case TypeCode.Int16: output.Push(s <= (Int16)right); return;
                        case TypeCode.Int32: output.Push(s <= (Int32)right); return;
                        case TypeCode.Int64: output.Push(s <= (Int64)right); return;
                        case TypeCode.SByte: output.Push(s <= (SByte)right); return;
                        case TypeCode.Single: output.Push(s <= (Single)right); return;
                        case TypeCode.UInt16: output.Push(s <= (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(s <= (UInt32)right); return;
                    }
                    break;

                case TypeCode.Int32:
                    int i = (Int32)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(i <= (Byte)right); return;
                        case TypeCode.Char: output.Push(i <= (Char)right); return;
                        case TypeCode.Decimal: output.Push(i <= (Decimal)right); return;
                        case TypeCode.Double: output.Push(i <= (Double)right); return;
                        case TypeCode.Int16: output.Push(i <= (Int16)right); return;
                        case TypeCode.Int32: output.Push(i <= (Int32)right); return;
                        case TypeCode.Int64: output.Push(i <= (Int64)right); return;
                        case TypeCode.SByte: output.Push(i <= (SByte)right); return;
                        case TypeCode.Single: output.Push(i <= (Single)right); return;
                        case TypeCode.UInt16: output.Push(i <= (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(i <= (UInt32)right); return;
                    }
                    break;

                case TypeCode.Int64:
                    long l = (Int64)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(l <= (Byte)right); return;
                        case TypeCode.Char: output.Push(l <= (Char)right); return;
                        case TypeCode.Decimal: output.Push(l <= (Decimal)right); return;
                        case TypeCode.Double: output.Push(l <= (Double)right); return;
                        case TypeCode.Int16: output.Push(l <= (Int16)right); return;
                        case TypeCode.Int32: output.Push(l <= (Int32)right); return;
                        case TypeCode.Int64: output.Push(l <= (Int64)right); return;
                        case TypeCode.SByte: output.Push(l <= (SByte)right); return;
                        case TypeCode.Single: output.Push(l <= (Single)right); return;
                        case TypeCode.UInt16: output.Push(l <= (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(l <= (UInt32)right); return;
                    }
                    break;

                case TypeCode.SByte:
                    sbyte sb = (SByte)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(sb <= (Byte)right); return;
                        case TypeCode.Char: output.Push(sb <= (Char)right); return;
                        case TypeCode.Decimal: output.Push(sb <= (Decimal)right); return;
                        case TypeCode.Double: output.Push(sb <= (Double)right); return;
                        case TypeCode.Int16: output.Push(sb <= (Int16)right); return;
                        case TypeCode.Int32: output.Push(sb <= (Int32)right); return;
                        case TypeCode.Int64: output.Push(sb <= (Int64)right); return;
                        case TypeCode.SByte: output.Push(sb <= (SByte)right); return;
                        case TypeCode.Single: output.Push(sb <= (Single)right); return;
                        case TypeCode.UInt16: output.Push(sb <= (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(sb <= (UInt32)right); return;
                    }
                    break;

                case TypeCode.Single:
                    float f = (Single)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(f <= (Byte)right); return;
                        case TypeCode.Char: output.Push(f <= (Char)right); return;
                        case TypeCode.Double: output.Push(f <= (Double)right); return;
                        case TypeCode.Int16: output.Push(f <= (Int16)right); return;
                        case TypeCode.Int32: output.Push(f <= (Int32)right); return;
                        case TypeCode.Int64: output.Push(f <= (Int64)right); return;
                        case TypeCode.SByte: output.Push(f <= (SByte)right); return;
                        case TypeCode.Single: output.Push(f <= (Single)right); return;
                        case TypeCode.UInt16: output.Push(f <= (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(f <= (UInt32)right); return;
                        case TypeCode.UInt64: output.Push(f <= (UInt64)right); return;
                    }
                    break;

                case TypeCode.UInt16:
                    ushort us = (UInt16)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(us <= (Byte)right); return;
                        case TypeCode.Char: output.Push(us <= (Char)right); return;
                        case TypeCode.Decimal: output.Push(us <= (Decimal)right); return;
                        case TypeCode.Double: output.Push(us <= (Double)right); return;
                        case TypeCode.Int16: output.Push(us <= (Int16)right); return;
                        case TypeCode.Int32: output.Push(us <= (Int32)right); return;
                        case TypeCode.Int64: output.Push(us <= (Int64)right); return;
                        case TypeCode.SByte: output.Push(us <= (SByte)right); return;
                        case TypeCode.Single: output.Push(us <= (Single)right); return;
                        case TypeCode.UInt16: output.Push(us <= (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(us <= (UInt32)right); return;
                        case TypeCode.UInt64: output.Push(us <= (UInt64)right); return;
                    }
                    break;

                case TypeCode.UInt32:
                    uint ui = (UInt32)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(ui <= (Byte)right); return;
                        case TypeCode.Char: output.Push(ui <= (Char)right); return;
                        case TypeCode.Decimal: output.Push(ui <= (Decimal)right); return;
                        case TypeCode.Double: output.Push(ui <= (Double)right); return;
                        case TypeCode.Int16: output.Push(ui <= (Int16)right); return;
                        case TypeCode.Int32: output.Push(ui <= (Int32)right); return;
                        case TypeCode.Int64: output.Push(ui <= (Int64)right); return;
                        case TypeCode.SByte: output.Push(ui <= (SByte)right); return;
                        case TypeCode.Single: output.Push(ui <= (Single)right); return;
                        case TypeCode.UInt16: output.Push(ui <= (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(ui <= (UInt32)right); return;
                        case TypeCode.UInt64: output.Push(ui <= (UInt64)right); return;
                    }
                    break;

                case TypeCode.UInt64:
                    ulong ul = (UInt64)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(ul <= (Byte)right); return;
                        case TypeCode.Char: output.Push(ul <= (Char)right); return;
                        case TypeCode.Decimal: output.Push(ul <= (Decimal)right); return;
                        case TypeCode.Double: output.Push(ul <= (Double)right); return;
                        case TypeCode.Single: output.Push(ul <= (Single)right); return;
                        case TypeCode.UInt16: output.Push(ul <= (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(ul <= (UInt32)right); return;
                        case TypeCode.UInt64: output.Push(ul <= (UInt64)right); return;
                    }
                    break;
            }

            // Invalid operation
            throw new InvalidOperatorTypesException("<=", left, right);
        }
    }
}

